Two like poles of strengths m1 and m2 are far distance apart. The energy required to bring them ro distance apart is

Wext. =ΔU=Uf−Ui=μ0m1m24πr0−0=μ0m1m24πr0

Two like poles of strengths m1 and m2 are far distance apart. The energy required to bring them ro distance apart is

Wext. =ΔU=Uf−Ui=μ0m1m24πr0−0=μ0m1m24πr0

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Two like poles of strengths m₁ and m₂ are far distance apart. The energy required to bring them r_o distance apart is

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$\frac{μ_{0}}{8 π} \frac{m_{1} m_{2}}{r_{0}}$

$\frac{μ_{0}}{4 π} \frac{m_{1} m_{2}}{r_{0}}$

none of these

$\frac{μ_{0}}{16 π} \frac{m_{1} m_{2}}{r_{0}}$

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$\begin{array}{l} W_{ext.} = ΔU = U_{f} - U_{i} \\ = \frac{μ_{0} m_{1} m_{2}}{4 {πr}_{0}} - 0 = \frac{μ_{0} m_{1} m_{2}}{4 {πr}_{0}} \end{array}$

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Two like poles of strengths m1 and m2 are far distance apart. The energy required to bring them ro distance apart is

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Two like poles of strengths m₁ and m₂ are far distance apart. The energy required to bring them r_o distance apart is